Lubrication guide



2 Sheets-Sheet 1 C. E. HOLT LUBRICATION GUIDE Filed Nov.

INVENTOR. r/ffla/f ATTORNEY Nov. 11, 1930.

Filed Nov. 26,1928

2 Sheets-Sheet 2 R s. 0 0 v. m W I U A K 2 hm H mm mm mm ESQ n a h, v E. u i U M g M m m /O\ ml ow 4535i N% mam uz mw $5 Patented Nov. 11, 1930 .,UNiTEn stares PATENT ouster.

cast t. norm, or KANSAS orrnnissouar LUBRICATION' GUIDE Application filed November 26, 1928. Serial No. 322,052.

the factors that determine theconditions being the character of fuel, the rate of circu- 15. lationof the cooling medium, and thespeed of the engine, the efficiency of the particular lubricant being predicated onthe normal operation of the machine and normal condition of mechanism. N o means have hereto- .20 tore been provided for 'uidin the o aerator l a a 'in discovering whether heis operating the machine under the normal conditions for most efficient service of the lubricant with which the machine is supplied; or in selecting a different lubricant to suit changedconditions.

The principal objects of the invention therefore are to inform the operator as to the suitability of the lubricant with which the 0 machine is supplied, and to enablethe operator to select and supply a suitable lubricant when the lubricant being used is indicated to be unsuitable, and to adjust; operation and demands for lubrication to the lubricant in the machine. i

A further object ofthe invention is to providetemperature responsive means for determining the character of the lubricant to be used in an internal combustion engine, which means is influenced by the changes in term perature of the engine, and a scale co-operatiag therewith indicating the character of the lubricant to be used in said engine within certain ranges of temperature indicated in re- Further objects of the invention are to de- 'termine a combined temperature characteristic of a plurality of points in an internal 1 combustion engine, as a step in determining the suitability of the lubricant being used and the character of a requ red lubricant; to

control the indication of aheat effect of one part of anengine by the heat effect of another part, and particularly to determine the combined temperature characteristlc by provld- .ing tempmature-responsive members influenced by temperatures at a plurality of points in the engine, whereby the indication of the response at one point will be modified and coi'itrolled by the response at anotherpoint.

Further objects of the intention areto control uranium that afi'ect the temperature ofthe lul'n'icant; for example, to control the cooling medium, and thereby modify the heating of the lubricant by conduction; and to contro. the luel supply and ignltion, in

order to retain the lubricant at a temperature suitable for eiiicient service in the engine, and prevent operation at excessive temperatures.

It is a further object olitheinvention to provide a device of the character above mentioned with aplurality of scales, one of which indicates the character of the lubrlcant to be used andtheother of which inclicates thelength of time that each lubricant shall beused conforming to the characteristics of the scale previously referred to.

. In accomplishing these and other objects of the invention, I have provided an improved method, andnieans for employing the same, preferred forms of which are illustrated in the accompanying drawings, wherein: l i l i Fig. 1 is a view partly in elevation and partly in sectionof an internal combustion engine, showing my improved lubrication meter associated therewith.

Fig. is an enlarged perspective view of my improved lubrication meter and scale shown partly in elevation and partly in section i Fig. 3 is a detailed viewof a portion of a tube guard andtube illustrating the restriction ofthetube to restrain liquid from pass ing from maximum indicating position until reset by operator. e

Fig. 4 is a front elevational viewof an indicatondial or face for a modified form of indicator.

Fig. is a vertical central sectional view' of the modified form of indicator, a resetting keybeing shown in spaced relation with the operating shaft. 7 1

Fig. 6 is an elevational View of indicator operating mechanism.

Fig. 7 's a detailed perspective view of a removable 1nd1ca'tor dual or face for;'moimtmg on the 1nd1cator.,

Fig. 8 is a View partly in sideflelevation,

partly in section and partly diagraminatic ot' an engine and mechanism responsive to temperature of the lllbllCfiIltiOI controlling the cooling medium and actuatmg elements of an engine for limiting temperatures of engme parts sultably' for 'eflicient service of 'Lthe' lubricant with which the engine is supjplied,togetheriwith almodifled form of indicating device, such as shown inFigs. 4 to 7 Referring in detail to the-drawings:

1 designates an internal combustion engine such as used in an automobile, including a crankcase 2 having'a sump" 3, a false bottomor pan '4 provided with splashor dipper. troughs 5 and a crank 6 operating on main Qthe walls of the cylinders and absorbing heat from all parts touched.

A pum'p '11 delivers lubricant from the sumpto a valve chamber 12 from Whichjthe lubricant passes through channels 13 to parts such asthe main bearings 7 and drips from the main bearings to the false bottom. Ov erflow of an excess of lubricant in'the valve chamber 1s provlded tor, the excess flowing through a conduit 14 and dripping from an outlet 15 to the false bottom, while relatively small amounts of lubricant that pass outwardly over the rear main bearing drain to thesump through a conduit 16. Overflow from the troughs flows over. one end 17' of the false bottom into the sump, the outlet 15 delivering overflow from the valve chamber to the opposite. end of the'false bottom.

I A: water jacket 18 surrounds the cylinders and water is circulated when desired and at a desired rate through the jacket and to a radiator not shown, a fan 19 producing a blast that passes through the radiator to cool the water 'and'also passes overthe surwhich abayonet may be inserted for measv uring the depthfo't thebody 23 of lubricant, 'largement 48 within the indicator casing and face of the crank caseunder the hood.

v Alobe or shoulder 21 on theupperfhalf of the crank case in the illustrated-type of engine, is provided with an opening 22 into in "the sump.

The structure just described comprises an ordinary internal combustion engine repreinvention may be applied; and forillustra-f tivepurposes theinvention will be described las'adapted for use on such an engine in a f preferredform and in itssimplest aspect. My invention comprises a temperature responsive indicating device generally desig-1 nated 24;*and comprising atemperature responsive member 25 which may consistrot a glass thermometer containmg an expanslble element such as mercury; and a scale element or, lIlfllQiLtlllgmHlbQI' 26 IIltO'WhlClTthB tube extends, a tubular casing 27: being provided for supporting and protecting-the tube, whereby the device may be inserted through the opening 22 for extending the tube'into the lower portion of the crank case'where the mercury may be influenced by the various temperatures in and aroundthe crank case. 7

; vThe tubecomprises, 'a 'diflerentiatedloweriend portion 28 adapted for'positioning' in the sumpfor influence on the mercury by the 'temwe perature of lubricant in-the sump, a .di-flerenti'ated enlarge portion 29 such has a bulbous member for positioning above'the false bot- 7 tom forjinfluence bythe' temperatures in the l.CI-" L11k case chamber 10, anda further difleren. V

tiated portion or bulbous member 30 designed to stand in the opening '22 for influence by; "the'tempe'rature or thewalls of the case. Up-

per and lower openings'81 and 32 are distributed" in the guard'adjacent the portion 29,

both above and below the same for admitting 'spray and heat'fromthe crankcase to said portion 29 and openings 33 are similarly dis tributed in the guard'adj acent the portion 30 so that-the temperature of the case walls may freely influence the mercury at that point.

and material, for examplelubricant passing downwardly over the tube within the guard,

may flll the space between the tube and guard The guard may be closed atits lower end,

Avail to conduct heat from the lubricant and guard to the tube and mercury. Lubricant tends to circulate throughthe openings 31 and 32 over the adjacent portion of the tube, entering atone group of openingsand leaving at the other group. v 1

y and 38' through which the upper level or indicating position of the mercury may be ob- 2 served and throughwhich air drivenby the fan may-pass, theca-se having parallelverti-" 'calguide grooves 39 and 40 to receive a removable and replaceable chart 41 having symbols and indicia 42 to 47inclusive, later described, for informing of the significance of the indications of "the column of mercury.

below the lower sight opening 36 to provide for a relativelylarge'bodyof the mercury at that point and thereby limit the movement of i "The tube is further provided with an en-- thehiercury so that the adj acent normal portion49 of the tube which is visiblethrough the opening may be relatively-short and yet suffice for dis'clesing arelatively wide range ofresponses of thei'nercury to temperature.

- "Similarenlargements 50 and o-lgareiproyidedinthe tube below theportions 52 and 53' thereof that are visible-through the sight openings 37 and 38, for similar purposes. The enl emeutst8, 50 and5l also provide for r at-iyely large body of the expansible element adjacent the openings to be influenced by the temperature of the air drawn 0 er the crank case by thefan whereby the responses of; the mercury to changes in temperature V of thelubricant areinodified by air tempera- "Was intended. The instructions u the crank expand orstraighten under pressure of tn-res.

The removable chart platedl originally provided has nstructions represented by the -;"in-dici'a 42 to 4:? adapted for guiding the operator in adjusting his engine speed, fuel, and Water. supply, to'th'e character of lubri ant With-Which the engine is intially sup ed, and also guiding the o ierator in the selection ofa lubricant suitable for performing efficiently under conditions different from those for which the originally supplied lubricant pertain to an exteutef use, forexample, the number of inilesoyer Whiclran automobile may run before the lubricant'should be drained from the-crankcase, and tether kinds and types of oil which should be substituted for the oil in A. restrictionb i s provided in the tube adiiacent the indicator whereby the mercury ispermitted to movefreely upwardly for "indicating the net temperature of a plurality of factors in the engine butwill be restrained from return downwardly in the tube upon cooling, so that the maximum temperature obtained over any selected period Will be in When the maximum reading is observed at the suitdicatd by the restrained mercury.

able time, for example by an inspector at the end of a work day, therestraiued mercury may be returned to the lower end of the cube in the Well known manner.

The instructionswill vary according to tl e type of oil providedfor normal operation of the machine so that the operator may observe at any time Whether or not he is operating "the machine in such a manner that the lubricantwill serve efiiciently. i

The modified form of indicator illustrated in Fig. 4 may include a Bourdon tube, in

*Which case the upper end of a tube 55 containing an expansible fluid is connected into a collar 56 on Wl11Cl1 a clrcular housing 2 is mounted, and a curved resilient flat tube 58 of the Bourdon type arranged in the cas ing is connected to the tube 55 and tends to 4L0 bile,

fluid in the tube as affected by temperature "of the area to which a portion of the tube "55, such as theopposite end 59 may be; ex

posed. i i i p Pivotally connected tothe outer: end ofthe curved resilient member 58 is aulink 60 pix:- otally connected to the outer end of a crank 61 pivotally mounted on a pin 62 supported bythe housing, the inner end of the crank comprising a gear segment 63 meshed with a gear 64 on a hollow shaft lio fixed tothe housing and which maybe formedintegrally with the bacl-r ofthe housing.

An indicating linger 66 keyed tothe gear (34 has anolfset pointerfi'l extending through a circularly disposed slot 68 in a removable dialplate or face member 69 adapted for n'iounting on the housmg and provided with a circularly disposed series of sections provided with indicia 70, 71, 7 2 and 73 indicating grades of lubricating oil, and asimilar circularly disposed series ofinstructions "41-, 75, and 7 (5 indicating types of fuel.

The indicia 70 to 73 designatethe areas to which the movement of the finger should be limited to indicate that the temperatures in the engine are being malntaincd at the proper degrees formost eiiicient and safe operation of the engine, when the engine is supplied with the prescribed lubricant, the dial plate being provided for using such lubricant under particular conditions. The l1- dicia It, 75 and 76ers related to the indicia "$0 to 73, and designate ranges for most efficieut fuels for use WlIQTI the operating temperature is Within the efficient range of the prescribed lubricant over the period of time indicated by indicia 87, 88 and 89.

The dial plate isprovided with acircu lar opening 77 coaxial with the housing, and a disk 7 8 having slightly lar er diameter than that of the 01::ening is mounted on the outer endof ashaft 7 9 extending through the 1101 low shaft65, and retained by a transverse in 80. A coil soriu 81 bearing a ainst a washer 82 positioned on the end of the hollow shaft bears against the disk 78 to urge the shaft 7 9 outwardly and frictionally eugage a transverse pin 83in the opposite end of the shaft with the outer surface of the housing. I A leg 84 eccentrically mounted on the inner face of the dislr is eugageable by the finger for shifting the disk rotatively and positioning a pointer 85 on the outer face of the diskiu relation to one of the indicating sections on the dial plate, the disk remaining in its new position when the tin- In some engines, forelxamp'le high come; pression engines, it may be advisable to use so-called no knockfuelsat all times, how- I ever, varying the volatility and viscosity of this type of fuel.,for various operative conditions is desirable and economical as well.

as having an influence on the period of time an oil can be used in an engine that; is not, properly equipped to. remove the dilution from the engine crankcase.

Asection on the dial plate 69 is :provi ded with a series of indicia 87,88, and 89, representingextent of travel, and a second pointer or arrow-90 may be installedon the-disk: opposite tothe first named pointer and adapted-t'o point to the indicia 87, 88-and: 89, for

moves; and withwarning symbols 95 and 96 at each end of the arc in which the finger moves, whereby the finger, and the pointer 85 on the disk, may indicateand the engine is being orhasbeen operated in such a manner 7 as to produce temperatures under which the lubricant and the engine'may suffer damage.

While I have; illustrated and described. a

. heat responsive element pha'ving differen tiated portions adapted to receive the influ ences at' different positions in a machine, I

may obtain the ne't'heat effect on the temper-- .ature responsive element by positioning a temperature responsive memberin the 'lubri- I cant. at a position where the temperature is an average of temperatures. at a plurahty of points, for example in the sump, where the lubricant overflowing from the false bottom has an opportunity to coolbefore being pumped into the 'valvechamber and also is influenced, by the temperature of the road over which the machine is passing and by at 'mospheric temperature, or in the valve chamher, where the temperature of the lubricant is substantiallythat of the .sumpbut modi fied by the temperature of the valve chamber.

1 illustrate in Fig. 8 an installation in which'temperature responsive members comprise tubes containing anexpansible fluid and extending into the valve chamber, a device such'as that illustrated'in Fig; 4 being identified by the same numerals in. Fig. 8, and a controlled devicegenerallydesignated 97 including also a tube 98extending into the valve chamber and having a branch 99 on its outer end communicating-with a bellows 100 where- 'by expansion of fluid-in the tube may effect operation of a,valve"101 positioned in the water line 102 to the jacket, the connection comprising a yoke 103 operated by the belattained.

lows'and-a lever 104 for operatinglthe valve Shaft-105.

Thevalve is 'assumedtobe normally closed to limit :circulationfof "water until the tem-' peratureof' the lubricating oil, representing;

temperatures produced'bythe combustion of fuel "and operation of the. engine, has in creased to a suitable degreefor most GffiClQIllJ service by the lubricant; and in my structure the valve is adapted to be automatically oper'ated to delay heating of lubricantand also toeffect cooling of the cylinders to prevent overheating of the lubricant.

Should only a small amount of water .be present in thejacketwhen the engine is put into operation, steam may be generated hav-- ing high pressure and temperature, and ren dering it desirable that the valve be opened before the lubricant has attained its operat-.

ing temperature. I therefore provide a then mostatic element106 inthe valve responsive to the temperature in the jacket for opening the valve independently of the bellows, comprising a coil having one end fixed to the shaft 105 and the other end' to the valvelOl,

the thermostatic vcoil 106 operating the valve at varying temperatures due to the action of the bellows accelerating or retarding the ac;

tion of the thermostatic coil 106.

.Asecond branch 107 :f "om thetube conducts the expansible. fluid 1 into a bellows 108 adapted to operate a switch 109 in a circuit 110 connected to theignitio'n circuit 111 of r the engine whereby excessive pressure consequent upon the increaseof temperature of the eXpansible element beyond-a predetermined degree may operate the switch to break the circuit and suspend ignition for st0p-.

ping the machine.

An indicatingcontrol valve 112 connected into the tube 98 comprises a diaphragm valve having a diaphragm adjusting screw 113 provided with a scale, and a stationary pointer 11a, for indicating the adjustment of the diaphragm to increase or decrease the size of the lower chamber 115 communlcating with the tube. 1

The screw may be rotated-toenlargethe chamber. and providea larger space into which the fluid may expand for delaying action of the expandingfluid on the bellows so that a lubricant adapted foruse at high temperature may not cause actuation-0f the bellows until the desired high temperature is The utility of the invention and its novelty may berecognized by reference to "'a' few commonly disregardedor heretofore unrecog- "nized relations oftemperatures at different points in an internal combust on engine.

COHllOUStlOIl chamber temperatures of internal combustion engines vary 1n almost direct ratio to load conditions while Water jacket temperatures may remain constant;

a test a well known fourcylinder if;

engine with the cooling water constant at 120.E. it. was found that:

Developing 22 B. HJP. at 400 R. P. M. combustion chamber temp. 750. F. Developing 27 B. H. at 600 R. P. M. combustion chamber temp. 850 F.

DevclopiiigtfZli. H. P. at 800 R. P. M. combustion chamber temp. 950 F.

1 Developing l0 B. H. P at 1200 R. P. M. combustion chamber temp. 1100 F.

Developing B, H. l. at 16003. P. M. combustion chamber temp. 1200 .F.

These temperatures, variously modified, are transmittedby conduction to the parts of an enginethat must be lubricated.

The lubricant @used will further modify theheat in ratio to the rate of circulation, area exposed for radiating absorbed heat, condition of the surface through which the heat radiatecLand the temperatures ofthe BXDQIIltIlXl'DGCllLHD which absorb the heat.

Temperature responsivemeans placed in the lubricant in circulation within such an engine will indicate an average of all of the above mentioned temperatures, which will furnish indicia to the service, or work, the on he is performin p ince one skilled in the artcan determine the-preferred character and body of a lubricant to be used in such an engine for perfor ing various degrees'of work, Within the range of the engine, the indications can be adapted to indicate grades, character and body of lubricants best suited to render eflicient lubrication. v y

To illustrate: It has been found that a heat indicator placed as specified in the foregoing type of engine will record temperatures, depending upon the season of the year and the work being performed, from 80 F. to 229 F. Y'Thc lubricant best suited for this engine with indications up to 125 F. is a free flowing,free burningoil of approximately 45-47 Say. viscosity at 210 F. Indications up to 150 can. best be taken care of by a free burning oil of approximately 58-60" Say. viscosity at 210F. Indications up to 180 can best be taken care of by a'heat resistingoil of approximately 74L76 Say. viscosity. Indications up to 229 F. can best be taken care of by aheat resisting oil of approximately 9698 Say. viscosity at 210 F. With the heatindicator placed in this type ofengine it is found that when the lubricant is used'at a temperature indication at which it would have a Say. viscosity of less than 48' the danger point is fast approaching. Temperature may be regulated by adjustment of the cooling medium to keep within the above stated temperature indications for the grades of oil specified. When regulating the fuel supply of an engine, which limits the work "it can do, the fuel supply would be reduced gradually from an indication in advance of the 48 viscosity point,.until at this point the fuel supply would be almost or wholly shut off, and the ignition of the engine would then be interrupted when. the indication showed that the viscosity had dropped below the 48 or thereabout.

Engines run hot or 0001 according to the kind of work they .are doing and the way they are designed. The amount of lubrication protection an engine will require will also vary depending upon size, speed and class of work, facts known to those skilled in the art who would take them into consideration in interpreting the temperature indications as talren in applying the in vention. 1 The adjustments would also be reconciled with oil dilution and dirt in the engine air supply problems. Grades may be altered at known indications to assist in balancing the same; it being known that a heavy lubrication film is less affected than a light one. 1 A particular application of the invention will now bedescribed: i

An indicator element provided having indicia corresponding to the lubricant prescribed for the particular engine-and the conditions under which the engine will operate. F or example, in case of an automobile engine to operate in summer at moderate speed and under an average load, using :a so-called summer fuel, a grade X of lubricating oil may be prescribed,whichis adapted for most efficient service within a. speci" fied range of temperatures. The dial plate will be adapted for causing the heat responsive element to indicate portions of the scale in the range or section designated X when the engine is being operated under the conditions for maintaining the lubricant within such specified range.

The operator may observe the indicator and if theindicating portion ofthe heat responsiveelement moves into the section designated Y, he is thus informed that some factor "is causing excessive heating of the lubricant. Operations arethen adjusted "to prevent damage to the lubricantand the engine, such as regulation 'of the cooling medium and the fuel supply, control of ignition, and similar steps.

Should the indicator indicate that the temperature of the lubricant is'being maintained substantially below the range prescribed for X oil, the operator is informed of this fact, and also that the conditions require the use ofW oil.

In each case, the operator is informed that a difi'erent fuel should be used for the service demanded of the engine and thegtype of fuel is indicated, for example, no-knock fuel in the case of excessive temperature,and high test fuel in the case of deficient temperature. a i a The inspector who examines the indicator at the end of a run, will observe the maximum temperature recorded by the device,

for example observingtl at the maximum indication Was in the range tor Y- lubricant. He Will then'make suitable ad ustments, such as instructions .to the operator, changing the lubricant, limiting thespeed ofthe vehicle, substituting an efficient fuel, and making repairs and alterations in the mechanism. p H

The indicator further informsfthe operf ator and the inspector as-to drainage periods fora prescribed lubricant used under nor: mal or abnormal conditions'tor suchlubrie cant. lhe second pointer onthe' maximumtemperature disk Will indicate the. normal drainage period on the dial section having the. indicia therefor, .ivhen the first pointer indicates the type] ofilubrica nt,forenant ple X, with "which the engine is supplied.

Should the first pointer indicatefanotlier lubricant, for example. W7, the observer is informed that the draiHageQperiod should be alteredandxin this case reduced. V I

, The removable dial plate,- in eitherof the illustrated formso'f the device, ispreten' ably adapted to thelubricant suppliedfto' the engine, a plate having-the suitable scale indicia preferably being installed when the lubricant ischanged, the substituted plate having indicated drainage periods suitable tov the substituted.lubricant. :The lubricant provided is preferably. designated by the .termediateindicia'ofa series, so that the, in-

dicator may inform the observer as to preferred'types of lubricants foruse when the temperatures are excessive or deficient.

Theuse-of the device further includes the automatic adjustment of operations'affecting V perature, and may also control the ignition to suspendoperation when-the lubricant is heaed excessively and reflects a dangerous condition." a r I r My provisionsfor influence-on the indicator by temperatures at a plurality of points,

' further safeguards operation ofthe engine,

since the development of an excessive temperature at any of several points Will be reflected by the indicator. The overheating of a single bearing in the engine Would not indicate; requirement of a change of lubricant, being usually due to stoppageof lubricant from the bearing, and such overheating is not ordinarily registered by the device. However, if all bearing surfaces become heated to the extentv that the lubricant is thinned sufficiently to permit metal to metal contact,

the moving lubricant is correspondingly heated, and actuates' the indicator to Warn of a dangerouscondition. I

-E2;cessivejfroad temp'eraturesafi'ect the body of lubricant in thejsump. Excessive atmospherictemperatures affectboth the sump and the indicating portion'of the heat responsive element, the former influences being;

exerf ed on the lubricant to modify its te perat'ure, and the latter influence being eX- erted on the temperature responsiveelem'ent to modify its indication i I V for simplicity in While I "have suggested the description that specific types of lubri:

eating oils may be supplied to meet specific conditions, the adj ustment of the lubricant to the-demands of engine service'may .be accomplished by blending oils, to'reduce or increase the ,viscosity or similarly alterthe characterota lubricant originallydesignat- I ed. Themovement ofthe indicating por tion of the. temperature: responsive element f over a section, of the scale, indicates the ap 'proach of lubricant temperature to 'a condition requiring another type oif'lubricanQ-and fine gradations of lubricant character to eng ne operating conditions are therefore-pos- Y sible by the use 01": my device.

'Whatl claim and desire to secure' LettersPatent is: I I

LA temperature indicator applied to a machine having a plurality of heat-emitting elemenimcomprising a stem containing -a heat responsive fluid and having a plurality of'bulbous portions, each positioned in relation With a selected heat emittin'g element.

and means combining theresponses. of said IGiPOlISlVGifiliid to produce composite resu t.

' I 2. A lubricant-meter comprising a temperature responsive member, scale provided ion 7 with indicia representing types of lubricant and a series of indiciarepresenting types or fuel, and polnter actuatable by the'tempen attire-responsive member for in'dicatingjthe type of fuel sultable for use under the temperature cond t ons whereby the member is influenced.

I. AInethodotascertaining lubrication requirements of amachine, including arranging a temperature ndicator to receive different' heateliects at a plurality of locations in a machine, and disclosingthe character of lubricant adapted I to meet the requirements lndicated by the'net heat effect. 7

LA. methodef disclosing lubrication ref quirements in an operating machine comprising controlling heat indications conformably I to the difierences inthebody and character 01: lubricants adapted for use in the machlne under d fferent temperature conditions .in the machine, and indicating the different types of lubricants adaptedtomeet the dif ferent indicated temperature conditions.

5. The method of disclosing lubricating requirements of a machine, comprising arranging a temperature indicator to receive the heat eff cts of an area in the machine, indicating the useful ranges of particular lubricants ior particular services in the ma chine, and distributing the indicator to in dicate varying heat effects over predeter mined varying spaces corresponding to the usefulia ges of the particular lubricants.

6. A method "of ascertaining lubrication requirements of 'a machine, comprising arranging a temperature-responsive element to receive heat'efi'ects at a plurality of locations binedeiiect of temperatures at a plurality oi't'points therein, a rrangingascale inassocia tion with safid'xmeans, designating one element of the scaleto indicate normal condition for a selected lubricant under selected operating conditions in the machine, ascertaining the body and character of the lubricant which will best meet the lubrication requirements of the machine under said selected conditions, and designating another element of the scale to indicate an abnormal condition, hereby the use of said lubricant W'Tlfl result in the indication of said normal condition element of the scale by the temperature-responsive means when the machine is operating under the selecting-condition and the indication of the abnormal condition element when the machine is operating under said abnormal "condition. y

"8. A method of disclosing lubricant-requirements 'oia machine under d-ifierent operating-conditionscomprising arranging the temperature indicator in heat responsive relation to aplurality of heatablenreasof the machine, arranging a scale in "association with said indicator, designating'one element of the scale to representnormal lubrication requirements, ascertaining the body and character of the lubricant which best meets different lubricatioi-i requirements, and designating other elementsonthesca le to indicate the body and character of lubricants which will best satisfy the lubrication requirements of the machine when the indications of the indicator warn that the machine is-opera'ting abnormally.

*9. A method at disclosing lubrication requirements of a machine under diflerent operating conditions comprising arranging a temperature indicator with heat a responsive parts related to a lubricant chamber of the machine, arranging a scale in association with said indicator, designating one element of the scale to represent normal lubrication requirements, identifyingthe lubricant hava ing a body and character which best meets the requirement whereby the use of said identifiedlubricant will result in the indicator indicating said normal requirement designation when the machine is operating normally,

and designating other elements of the scaleto indicate respective lubricants having bodies and characters which will best satisfy the lubrication requirements of the machine conformably to indications of the indicator when the machine is operatingat less than or above normal.

10. The method of disclosing lubrication requirements of an internal combustionfem gine comprising initially selecting a lubricant suitable for the engine under normal opcrating conditions, designating the normal,

temperature of the suitable lubricant under normal operating CODClItIOI IS, arranging .an indicator for indicatlng the actual temperaa scale in associationwithsaid indicator for indicating the typeof lubricant suitable for use under said indicated actual temperatures.

1-1. The method of disclosing fuel requirements of an internal combustion engine, comprising initially selecting a lubricant suitable for the normal operation of the engine, designating the normal temperature of the lubricant under operating conditions, indicating the actual temperatures produced by operation, and indicating the typeof fuel suitable for use under said indicated actual temperature conditions.

Ann tures gnfoduced by operation, and arranging a so 12. Alubrication guide for determining suitable lubricants for a machine under different operating conditions, comprising te1n- .perature responsive means influenced by the fluctuations in temperature at a plurality of points in the machine, means for disclosing the response of said temperature responsive neans, and a scale associated with said disclosingineans, said scale being provided with designations of lubricants suitable for operating conditions indicated by said disclosing means.

13. A lubrication guide for determining the type of lubricant suitable for an operating condition in a machine, comprising temperature responsive means for disclosing fluctuations in temperature in the. machine under various operating conditions, and a scale provided with a plurality of indicia representing respectively the types of lubricants suitable for the various operating conditions disclosed by said temperature re sponsive means. i

let. A lubrication guide comprising a scale provided with indicia representing types of .il l

use"; under the disclosed machine condition having the highest temperature p e 15; A lubrication guide comprising-a temperature responsive member adapted to dis close fluctuations in, temperature in a ma chine, ascaleprov ded with a series otin 'dicia representing types of lubricants, and.

means enabling said member to record a maximum temperaturein the machine, said enabling means being adapted to identity the type of lubricant suitable for use under said maximum temperature condition in the machine.

: 16. A lubrication guidecomprising a tern 'cperature responsive member "provided with means: forgregistering maximum temperature j responses of saidimemberfaiid a scale 'pr0-; be r videdwith jindicia representing types or lubricants suitable for use under the temperature conditions whereby maximum registrations are eflected.

17. A lubrication guide comprising a temperature responsive membeig a scale pro-- vided with indiciarepresenting types of lubricants, and a pointer actuatable by; the temperature-responsive member for indicating the type of'l'ubricant suitable for use" under a temperature condition whereby the member is influenced. I 18. Av lubrication guide compris ng a temperature responsive member responsive to fluctuations in temperature in a machine, a scale provided with'a series of ndicia rep resenting types of lubricants and means eii-' 'abling said member to disclose said temperature fluctuations and a maximum temperature in the machine, said enabling. means type of lubricant suitable foruse under the close fluctuations intemperature ina; inachine and a maximum temperature, and a scale prOVid edJ vvith series of "in'di'cia representing respectively types of lubricants and oil drain periods, said enabling means beingfadaptedto identifythe type of lubricant'an'd drain period on said scale suitable for the temperature conditions in machine. v r p 20. Aliibricaticn guide comprising a temperature responsive member adapted to disclose fluctuations in teniperature'in a'niachine and to disclose a maximum temperature in the machine, a scale provided with series of indicia representingrespectively types of lubricants, oil drain periods and types of engine fuels,"said enabling means being adapted to cooperate with said scale sponsive member.

for identifying respectively the type otlubri- 7 cent, oil drain period, and type of engine fuel suitable for'use' under machine operating conditions whereby said temperature fluctua-' tions and maximum temperature weredeveloped in the machine.

in a machine, and means cooperating with saidscale for d sclos ng the operating temperatures 22 In a lubrication guide,iiii combination with means for disclosingworkingtemperatures of a lubricant in a machine due to oper-f ating conditions of the machine, ascale adapted to cooperatewith said means provided" with 'indicia representing types of lubricants respectively suitable for use under the operating conditions whereby the working temperatures of the lubricant aresdeveloped;

, 28. [n combination with scale provided with indicia representing rangesiof average temperatures oi heat-affected parts ofa machine. for eflicieiit service of variousYlubri-v cants'inthe machine, and indicia designating:

lubricants suitable for usein said tempera ture ranges, means responsive to temperatures in the machine adapted to indicate the range or temperature suitable for the lubricant nthe machine,

24. In combination with ineansresponsive to temperaturesot a plurality'of parts ina r machine, ascale provided with a plurality of groups of indicia representing respectively selected lubricants and the several'suitable 'anges of temperature" of said partsforei i'icient service of the lubricants in the machine,

'25. In combination with a machine adapted to beprovidedxwith alubricantsuited to the operating conditions of the" machine, a

lubricatioon guide comprising a heat respon- Y 1 v sive mem era a ted to disclose thetein erabemg adapted to ldentlfy on Smd scale the ture of aselected area'in the machineu nder,

various operating-conditions, and a scale havinga plurality of indicia representing respectively thelubricants suited to the severaloperating conditions disclosed by. the heat re- 1 26.. In comb nation' with aii engine and I means for circulating alubricant over-heats afiected'parts or. the engine,adevice of the character described for disclosing the-types of lubricant? suitable for diflerent engine:

operating conditions, comprising; a tempera ture responsive member adapted to disclose the average of the temperaturesof said'heat-V aiiected parts of the engine and a, scale provided witha plurality of indiciarepresenting respectively the types of lubricants suitable for efiicientservice in the engine under'the operating conditi'ons disclosed ibyl the temperature responsive means.

27.]In combination 1th a temperature 1 responsive member and a machine supplied- 7 if 'i LIL with a lubricant adapted to lubricate the machine efliciently under a predetermined temperature condition, a lubrication guide including scale provided with indicia designating types of lubricants suitable for use in the machine under various temperature conditions, and means enabling the temperature responsive member to indicate the lubricant suitable for use in the machine under the actual temperature conditions.

28. The method of disclosing lubrication requirements of a machine, comprising arranging an indicator to receive effects of changes in the working temperature of a lubricant in the machine due to changes in operating conditions of the machine, and disclosing the types of lubricant suitable for use in the machine under the operating conditions whereby the changed working temperature of the lubricant was developed.

29. The method of disclosing lubricant requirements of a machine under different operating conditions, comprising arranging an indicator to indicate the working conditions of the lubricant in the machine due to operating temperatures of the machine, arranging a scale in association with said indicator, ascertaining the characters of lubricants which would best meet the machine operating temperatures under which the working conditions of the lubricant are developed, and designating elements of the scale to represent said lubricants.

30. The method of disclosing lubricant requirements of a machine comprising initially selecting a lubricant suitable for the normal operation of the machine, designating lubricants for abnormal operation of the machine, designating the normal temperature of the selected lubricant under said normal operating conditions, indicating the actual temperatures produced by operation of the machine, and indicating the lubricant suitable for use under said indicated actual operating conditions.

31. The method of disclosing lubricant requirements of a machine comprising designating lubricants suitable for various operating conditions in the machine, designating the normal temperatures of the lubricants under said several operating conditions, indicating the actual temperatures produced by operation of the machine, and indicating the lubricant suitable for use under said indicated actual operating conditions.

32. The method of disclosing lubricant requirements of a machine under difierent operating conditions comprising arranging a temperature indicator to indicate fluctuations in temperature adjacent a part of the machine, arranging a scale in association with said indicator, designating one element on the scale to represent normal lubrication requirements, ascertaining the body and character of lubricants which would best meet the difierent lubrication requirements, and designating other elements on the scale to indicate the body and character of lubricants which will best satisfy the lubrication requirements of the machine when the indications of the indicator warn that the machine is operating abnormally.

33. The method of disclosing lubricant requirements of a machine under different operating conditions comprising arranging a temperature indicator to indicate fluctuations in temperature adjacent a part of the machine, arranging a scale in association with said indicator, ascertaining the body and character of lubricants which would best meet-the different lubrication requirements of the machine, designating one element of the scale to represent the lubricant adapted to meet the normal lubrication requirement, and designating another element 011 the scale to indicate a lubricant which will best satisfy another lubrication requirement of the machine.

In testimony whereof I aflix my signature.

CARL E. HOLT. 

